Microsoft BlueTrack Technology combines the power of optical with the precision of laser for remarkable tracking on virtually any surface Plug-And-Go Nano Transceiver 2.4 GHz Reliable Wireless 10-Month Battery Life Easily switch between open windows with the click of a button with Windows Flip in Windows® 7 4-way Scrolling 4 Customizable Buttons 1 AA alkaline battery required (included) 3 year limited warranty

The Microsoft Wireless Mouse 4000 lets you control your computer from wherever you choose to work-without any wires. Featuring a slick, contemporary design, the mouse combines the power of optical with the precision of laser so you get excellent performance on almost any surface. You can control common functions and switch between windows with a single click using Windows Flip in Windows 7. With four-way scrolling and Microsoft BlueTrack technology, the Wireless Mouse 4000 offers outstanding performance for all computer tasks. Thanks to its remarkable efficiency, you'll enjoy up to ten months of use from a single battery.

Tether-free Roaming and PresentationThe Wireless Mouse 4000 works up to fifteen feet away from your computer. Microsoft's BlueTrack technology ensures you'll have precise control of your screen or presentation. If you need to work on clear glass or a mirrored surface, use a mouse pad to maintain perfect tracking.

Sensitive and Accurate TrackingMicrosoft's BlueTrack Technology outperforms typical optical and laser mice. A large blue beam combines with a 1000-dpi image sensor to generate high-contrast pictures on virtually any surface. That means you'll get responsive, accurate tracking on almost any surface, including desks, floors, chair arms, and even your own pant leg.

Long Battery LifeA single battery provides all the power your wireless mouse needs for up to ten full months. There are absolutely no cords to tangle or for you to trip over. Extend battery life by snapping the mouse's nano transceiver into its slot when you've finished your presentation or work tasks.

Works Perfectly with Any ComputerThe Wireless Mouse 4000 works perfectly on either Mac or Windows computers. If you're a Windows user, take advantage of Flip 3D in Windows 7 and switch between open windows with a single click.

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